Punch attachment



Feb. 2, 1932.

A. L. KUHLMAN 1,843,135 PUNCH ATTACHMENT Filed Dec. 30, 1929 INVENTOR.

ATTORNEY.

Patented Feb. 2, 1932 ARTHUR L. KUHLMAN, OF DETROIT, MICHIGAN PUNCH ATTACHMENT Application filed December 30, 1929. Serial No. 417,457.

This invention relates to attachments for screw drivers, such attachments being in the form of punches, chisels, reduced screw driver blades, and similar tools, and particularly to an attachment which can be quickly and easily shifted into and outof working position.

For explanatory purposes I shall show and describe a punch attachment particularly adapted for attachment to a screw driver, so that a hole may be punched in the wood for starting a wood screw, after which the attachment is shifted upwardly, and the screw driver blade utilized for driving the screw home.

Another object is to provide a combination tool, which can be used as a punch, ice pick, or for various other purposes, and which is formed of resilient material so that it will be frictionally held in its retracted position on the screw driver shank.

The above and other objects will appear as the specification progresses, reference being had to the accompanying drawings, in which I have shown the preferred embodiment of my invention, and in which like reference numerals indicate like parts throughout the several views thereof.

In the drawings:

Fig. 1 is a view of a conventional screw driver showing the punch attachment in position for punching a hole.

Fig. 2 is an edge View of the device shown in Fig. 1.

Fig. 3 is a detail back View of the punch attachment.

Fig. 4 is a vertical sectional view thereof.

Fig. 5 is an end view of the device.

The advantages of a combination tool of this nature will be readily understood by carpenters, electricians, and others having occasion to seat wood screws, etc., as it eliminates the use of one tool when driving screws when seated on a ladder, or in places where the footing is insecure. It is also necessary to reach in the pocket, belt, or to a ledge for individual tools, thereby saving time and eliminating the risk of falling as the result of reaching and the consequent loss of balance.

Referring now particularly to the drawings, in which I have shown the preferred embodiment of my invention, the numeral 5 indicates the punch attachment which is preferably in the form of a stamping, the lower ing 10 is secured to the upper end thereof r by means of rivets 11, the side walls or wings 12 of said stamping extending outwardly and converging towards each other, thefree ends 13, being rolled and normally lying in close proximity so that when a screw driver blade 14; is'insertcd therebetween, a resilient gripping action will result, so that when not in use the attachment may be shifted upwardly on the shank so that the blade may be used in the conventional manner.

In assembling the attachment on a screw driver, the blade is turned at a slight angle and forced downwardly between the wings 12 until the blade 15 seats between the lip 7 and the main body, and the tool is now ready to be used as a punch. When it is desired to utilize the blade of the screw driver to drive a screw, the blade is forced out of engagement with the lip, and the attachment forced upwardly on the shank, the resiliency 8 of the metal insuring it being frictionally held in adjusted position.

From the foregoing description it will be obvious that I have perfected a very simple, inexpensive, and convenient attachment.

What I claim is 1. An attachment for a screw driver comprising a stamped plate having an outwardly bent lip punched from the main body for engaging the end of a screw driver blade, and a substantially U-shaped resilient stamping secured to the upper end of said plate and embracing the said screw driver shank for holding said attachment on a screw driver.

2.' An attachment for a screw driver comprising a stamped plate adapted to be mounted on the shank of the screw driver and shiftable into or out of engagement with 5 the end of the blade, means on said plate for engaging the lower end of the screw driver blade, and resilientwings on said attachHieI and embracing saidshank forvholding itin'positi'on on'said screw driver.

3. A punch attachment for a conventional screw driver comprising a .stan1ped plate having a pointed lower end, a lip on the face thereof for engaging the end of a. screw driver blade, and resilient inwardly converging wings on the upper end of the 'plate for detachably engaging the shank of a-screw Q'riv fl I punch attachment for a screwdriver comprising a plate, the upper end of which T b t n' j an l wi a n to t y. the lo'werfend being pointed, a lip intermediate the length" oi the plate and punched t'he refroin, and substantially U-shaped resil ie'nt' vvi'nzgs on; the upper :end of the plate for detachably" embracing a screw driver bladl"" 5, A punch attachment for a conventional screw driver-comprising a plate having a 'pdintedlo'wer end, "resilient wings vsecured on the up per end ofsaid-plate for resiliently and detacha'hly embracing a screw driver made, and anintegral up on theiface of the ,teifor engaging the end "of a screw driver blade-i .35 In testimony whereof I hereunto :aflix my gn 7 v. t. v 

